Philip Cortelyou Johnson (July 8, 1906 – January 25, 2005) was a prominent American architect known for his contributions to 20th-century architecture and design. He holds the distinction of being the first male designer to receive the prestigious Pritzker Architecture Prize in 1979, marking a significant milestone in the history of architecture.

### Early Life and Education
Born in Cleveland, Ohio, Johnson was raised in a wealthy family which enabled him to pursue his interests in architecture and the arts from a young age. He studied at the Hackley School in Tarrytown, New York, before enrolling at Harvard University. Initially majoring in philosophy, Johnson developed a keen interest in architecture and later switched his focus, which set the foundation for his illustrious career in the field.

### Career Beginnings
After graduating from Harvard, Johnson joined the Museum of Modern Art (MoMA) in New York City as the curator of the architecture department. This position allowed him to exert substantial influence on the architectural scene both in the United States and internationally. He was instrumental in organizing the landmark exhibition "The International Style: Architecture Since 1922," which helped to introduce European modernist architecture to an American audience and solidify the style's influence.

### Architectural Philosophy and Notable Works
Philip Johnson was known for his eclectic style and willingness to explore various architectural ideologies. His early works were heavily influenced by modernism, as seen in his design of the Glass House in New Canaan, Connecticut, which he designed as his own residence. Completed in 1949, the Glass House features minimalistic structures and full glass walls that reflect and interact seamlessly with the surrounding landscape.

Over the decades, Johnson’s style evolved, and he experimented with different forms, materials, and historical styles, a characteristic that came to define the postmodern architectural movement. One significant example is his design of the AT&T Building (now known as the Sony Tower) in New York City. The building’s design broke away from the then-dominant minimalist approach with its ornamental pink granite and a broken pediment top, resembling a Chippendale highboy dresser. This design stirred considerable debate and criticism, but it remains a notable example of postmodern architecture.

### The Pritzker Architecture Prize
In 1979, Johnson's influence and innovation in architecture were officially recognized when he was awarded the Pritzker Architecture Prize, becoming the first male recipient of this accolade. The Pritzker Prize, often referred to as the Nobel Prize of Architecture, cited his use of "pure architecture" and his ability to maintain "a high level of quality, innovation, and thoughtfulness." This acknowledgment helped cement his status as one of the leading architects of his time.

### Legacy and Influence
Beyond his architectural achievements, Johnson's legacy includes mentoring several future leaders in architecture, such as Peter Eisenman and John Burgee. Johnson was also known for his contributions to architectural theory and criticism, often engaging in lively debates over the direction of the field.

### Conclusion
Philip Johnson’s career spanned over six decades, leaving an indelible mark on the world of architecture. His pioneering works and his willingness to embrace new ideas and reinterpret architectural norms have inspired generations of architects. As the first male recipient of the Pritzker Architecture Prize, Johnson's prolific output and visionary designs continue to be celebrated as integral parts of architectural history.